Characterizing the Development Pattern of a Colluvial Landslide Based on Long-Term Monitoring in the Three Gorges Reservoir
Since the impoundment of the Three Gorges Reservoir (TGR) in June 2003, the fluctuation of the reservoir water level coupled with rainfall has resulted in more than 2500 landslides in this region. Among these instability problems, most colluvial landslides exhibit slow-moving patterns and pose a sig...
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| Format: | Article |
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MDPI AG
2021-01-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/13/2/224 |
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| author | Xin Liang Lei Gui Wei Wang Juan Du Fei Ma Kunlong Yin |
| author_facet | Xin Liang Lei Gui Wei Wang Juan Du Fei Ma Kunlong Yin |
| author_sort | Xin Liang |
| collection | DOAJ |
| description | Since the impoundment of the Three Gorges Reservoir (TGR) in June 2003, the fluctuation of the reservoir water level coupled with rainfall has resulted in more than 2500 landslides in this region. Among these instability problems, most colluvial landslides exhibit slow-moving patterns and pose a significant threat to local people and channel navigation. Advanced monitoring techniques are therefore implemented to investigate landslide deformation and provide insights for the subsequent countermeasures. In this study, the development pattern of a large colluvial landslide, locally named the Ganjingzi landslide, is analyzed on the basis of long-term monitoring. To understand the kinematic characteristics of the landslide, an integrated analysis based on real-time and multi-source monitoring, including the global navigation satellite system (GNSS), crackmeters, inclinometers, and piezometers, was conducted. The results indicate that the Ganjingzi landslide exhibits a time-variable response to the reservoir water fluctuation and rainfall. According to the supplement of community-based monitoring, the evolution of the landslide consists of three stages, namely the stable stage before reservoir impoundment, the initial movement stage of retrogressive failure, and the shallow movement stage with stepwise acceleration. The latter two stages are sensitive to the drawdown of reservoir water level and rainfall infiltration, respectively. All of the monitoring approaches used in this study are significant for understanding the time-variable pattern of colluvial landslides and are essential for landslide mechanism analysis and early warning for risk mitigation. |
| first_indexed | 2024-03-09T05:15:16Z |
| format | Article |
| id | doaj.art-b6af51b540bc47059d1348f702dbe0d9 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T05:15:16Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-b6af51b540bc47059d1348f702dbe0d92023-12-03T12:46:02ZengMDPI AGRemote Sensing2072-42922021-01-0113222410.3390/rs13020224Characterizing the Development Pattern of a Colluvial Landslide Based on Long-Term Monitoring in the Three Gorges ReservoirXin Liang0Lei Gui1Wei Wang2Juan Du3Fei Ma4Kunlong Yin5Faculty of Engineering, China University of Geosciences, Wuhan 430074, ChinaFaculty of Engineering, China University of Geosciences, Wuhan 430074, ChinaSchool of Environmental Studies, China University of Geosciences, Wuhan 430074, ChinaThree Gorges Research Center for Geohazards, Ministry of Education, China University of Geosciences, Wuhan 430074, ChinaGeohazard Prevention Center, Chongqing 404100, ChinaFaculty of Engineering, China University of Geosciences, Wuhan 430074, ChinaSince the impoundment of the Three Gorges Reservoir (TGR) in June 2003, the fluctuation of the reservoir water level coupled with rainfall has resulted in more than 2500 landslides in this region. Among these instability problems, most colluvial landslides exhibit slow-moving patterns and pose a significant threat to local people and channel navigation. Advanced monitoring techniques are therefore implemented to investigate landslide deformation and provide insights for the subsequent countermeasures. In this study, the development pattern of a large colluvial landslide, locally named the Ganjingzi landslide, is analyzed on the basis of long-term monitoring. To understand the kinematic characteristics of the landslide, an integrated analysis based on real-time and multi-source monitoring, including the global navigation satellite system (GNSS), crackmeters, inclinometers, and piezometers, was conducted. The results indicate that the Ganjingzi landslide exhibits a time-variable response to the reservoir water fluctuation and rainfall. According to the supplement of community-based monitoring, the evolution of the landslide consists of three stages, namely the stable stage before reservoir impoundment, the initial movement stage of retrogressive failure, and the shallow movement stage with stepwise acceleration. The latter two stages are sensitive to the drawdown of reservoir water level and rainfall infiltration, respectively. All of the monitoring approaches used in this study are significant for understanding the time-variable pattern of colluvial landslides and are essential for landslide mechanism analysis and early warning for risk mitigation.https://www.mdpi.com/2072-4292/13/2/224development patterncolluvial landslidelong-term monitoringThree Gorges Reservoirwater level fluctuationrainfall |
| spellingShingle | Xin Liang Lei Gui Wei Wang Juan Du Fei Ma Kunlong Yin Characterizing the Development Pattern of a Colluvial Landslide Based on Long-Term Monitoring in the Three Gorges Reservoir Remote Sensing development pattern colluvial landslide long-term monitoring Three Gorges Reservoir water level fluctuation rainfall |
| title | Characterizing the Development Pattern of a Colluvial Landslide Based on Long-Term Monitoring in the Three Gorges Reservoir |
| title_full | Characterizing the Development Pattern of a Colluvial Landslide Based on Long-Term Monitoring in the Three Gorges Reservoir |
| title_fullStr | Characterizing the Development Pattern of a Colluvial Landslide Based on Long-Term Monitoring in the Three Gorges Reservoir |
| title_full_unstemmed | Characterizing the Development Pattern of a Colluvial Landslide Based on Long-Term Monitoring in the Three Gorges Reservoir |
| title_short | Characterizing the Development Pattern of a Colluvial Landslide Based on Long-Term Monitoring in the Three Gorges Reservoir |
| title_sort | characterizing the development pattern of a colluvial landslide based on long term monitoring in the three gorges reservoir |
| topic | development pattern colluvial landslide long-term monitoring Three Gorges Reservoir water level fluctuation rainfall |
| url | https://www.mdpi.com/2072-4292/13/2/224 |
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